"The first day of the week is mentioned in the New Testament only eight times, and is not in a single instance spoken of as a Sabbath, a day of rest, or a sacred day. It is simply called the first day of the week.
On the other hand, inspiration gives the seventh day of the week in the New Testament the sacred title of the Sabbath fifty-nine times.
Luke 24
1 Now upon the first day of the week, very early in the morning,
they came unto the sepulcher, bringing the spices which
they had prepared, and certain others with them."
they had prepared, and certain others with them."
James White